.timeline ul li{
    list-style: none;
    position: relative;
}
.timeline ul{
    position: relative;
}
.timeline ul:before{
    position: absolute;
    top: 25px;
    bottom: 0;
    left:-10px;
    z-index: 100;
    width: 2px;
    height: 100%;
    margin-left: -1px;
    content: '';
    background-color: #ccd1d9
}
.timeline ul li .circle{
    position: absolute;
    left:-20px;
    top:5px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    padding: 3px;
    border: 1px solid #009688;
    background-color: #fff;
    z-index: 100;
}
.timeline ul li .circle .circle_child{
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color:  #009688;
}
.timeline ul li .event{
    margin-left: 20px;
    margin-bottom: 50px;
}
.timeline ul li .event .title{
    color:#009688;
    font-size: 18px;
    font-family: "Helvetica Neue";
    line-height: 28px;
}
.timeline ul li .event .desc{
    color:#2c2c2c;
    font-size: 15px;
    font-family: STSongti-SC-Regular;
    line-height: 28px;
}
.timeline ul li .event .tip{
    color:#1E9FFF;
    font-size: 12px;
    font-family: STSongti-SC-Regular;
    line-height: 28px;
}